International Journal of Thermophysics最新文献

{"title":"Thermal Transport and Thermal Diffusivity by Laser Flash Technique: A Review","authors":"R. Sundar,&nbsp;C. Sudha","doi":"10.1007/s10765-024-03479-0","DOIUrl":"10.1007/s10765-024-03479-0","url":null,"abstract":"<div><p>Thermophysical properties encompassing specific heat, thermal conductivity, thermal diffusivity and thermal expansion and their temperature dependence is most sought after during selection of materials for various engineering applications. In this review a broad perspective on the thermal transport in metals and alloys, thermal energy carriers and factors affecting their mean free path is presented. Following the discussion on thermal transport, various techniques available for measuring thermal diffusivity, their principle of detection, merits and demerits are deliberated with an emphasis on laser flash analyzer. Theory of laser flash analysis, possible causes for deviation in the theoretical assumptions that affect the accuracy of measured diffusivity and ways and means of improving the same is dwelt upon. Finally, few typical case studies on thermal diffusivity measurements covering broad spectrum of materials differing in chemistry, degree of deformation, and heat treatment conditions are presented to demonstrate the sensitivity of thermal diffusivity to microstructural changes in materials.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10765-024-03479-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effective Thermal Conductivity of Cyclohexane-Based Nanofluids Containing Cerium Dioxide Nanoparticles with Chemisorbed Organic Shell","authors":"Francisco E. Berger Bioucas,&nbsp;Wenchang Wu,&nbsp;Lisa M. S. Stiegler,&nbsp;Wolfgang Peukert,&nbsp;Johannes Walter,&nbsp;Tadafumi Adschiri,&nbsp;Akira Yoko,&nbsp;Thomas M. Koller,&nbsp;Andreas P. Fröba","doi":"10.1007/s10765-024-03480-7","DOIUrl":"10.1007/s10765-024-03480-7","url":null,"abstract":"<div><p>In the present study, the effective thermal conductivity <i>λ</i>_eff of nanofluids containing metal oxide nanoparticles with a chemisorbed organic shell was investigated experimentally and theoretically. The model systems synthesized by a continuous-flow hydrothermal method consist of cyclohexane as organic base fluid and dispersed nearly spherical cerium dioxide (CeO₂) core nanoparticles with a decanoic acid shell chemically attached to their surface. From the differences between the hydrodynamic diameters of the two core–shell nanoparticle types with (8.6 or 9.1) nm determined by dynamic light scattering (DLS) and the nearly spherical CeO₂ core diameters obtained by analytical ultracentrifugation (AUC) and transmission electron microscopy (TEM), an estimation for the thickness of the entire hydrodynamic layer around the particle core in the range of about (1.1 to 1.3) nm could be deduced. Experimental data for <i>λ</i>_eff of the nanofluids and the thermal conductivity of the base fluid <i>λ</i>_bf were determined with a steady-state guarded parallel-plate instrument (GPPI) with an expanded (<i>k</i> = 2) relative uncertainty of 0.026 at atmospheric pressure over a temperature range from (283.15 to 313.15) K in steps of 10 K. The measurement results for the thermal-conductivity ratio <i>λ</i>_eff ·<i>λ</i>_bf^–1 are independent of temperature and increase with increasing volume fraction of the CeO₂ core nanoparticles up to about 0.023. It was found that the experimental results can be described by the Hamilton–Crosser model within their experimental uncertainties for all temperatures investigated.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10765-024-03480-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Volumetric Properties and Viscosity of PIBs and PIB-Based Dispersants in a Mineral Oil","authors":"Katrina Avery,&nbsp;Mark T. Devlin,&nbsp;Erdogan Kiran","doi":"10.1007/s10765-024-03485-2","DOIUrl":"10.1007/s10765-024-03485-2","url":null,"abstract":"<div><p>In this study we report on the influence of poly(isobutylene) (PIB) and PIB-based dispersants on the high pressure thermodynamic properties and the viscosity of a mineral base oil used in passenger vehicle transmission fluids. Density was measured over a pressure range from 10 to 35 MPa at isotherms of 298, 323, 348, 373, and 398 K using a high pressure variable-volume view cell. The density data were then correlated with the Sanchez-Lacombe Equation of State from which the thermodynamic properties of isothermal compressibility, isobaric expansively and internal pressure were derived. Viscosity was measured over a pressure range from 10 to 45 MPa at 298, 323, 248, and 373 K using a uniquely designed high pressure rotational viscometer. Viscosity data were then correlated with density according to the free volume and density-scaling formalisms to provide further insights into molecular packing and interactions.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10765-024-03485-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142890093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Biomass-Based Additives on the Thermal, Physical, and Mechanical Properties of Fired Clay Bricks: A Review","authors":"Kovo G. Akpomie,&nbsp;Alhadji Malloum,&nbsp;Samson O. Akpotu,&nbsp;Kayode A. Adegoke,&nbsp;Emmanuel Sunday Okeke,&nbsp;Elizabeth O. Omotola,&nbsp;Chinemerem Ruth Ohoro,&nbsp;James F. Amaku,&nbsp;Jeanet Conradie,&nbsp;Chijioke Olisah","doi":"10.1007/s10765-024-03476-3","DOIUrl":"10.1007/s10765-024-03476-3","url":null,"abstract":"<div><p>The wide use of clay minerals in various applications, particularly the production of fired bricks for buildings, has led to the continuous depletion of clay deposits. Moreover, a considerable amount of waste is generated globally which negatively impacts the environment and is constantly increasing. To conserve the environment and reduce clay depletion, it has become popular to incorporate these wastes into clays for fired brick production. Biomass-based wastes are advantageous when used as additives because they enhance the technological properties of the bricks, reduce energy and cost requirements, and alleviate the effect of climate change on buildings. This work reviews the influence of biomass-based additives on the physical, mechanical, and thermal properties of fired clay bricks. We considered recent articles (2014–2024) on various biomass-based additives, describing how the dosage of the additives influences the shrinkage, porosity, water absorption, bulk density, compressive strength, and thermal conductivity of fired bricks. The optimum values of the technological properties from the studies reviewed were highlighted. Moreover, the knowledge gaps were identified, and future perspectives were presented. In general, the incorporation of biomass-based materials in fired bricks decreased the thermal conductivity and density, which is suitable for sustainable lightweight thermally insulating bricks.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Elucidating the Interaction Interplay Between the Gabapentin an Anticonvulsant Drug and 2-Hydroxyethylammonium Octanoate-Based Surface-Active Ionic Liquids","authors":"Mohammad Bagheri,&nbsp;Hemayat Shekaari,&nbsp;Masumeh Mokhtarpour,&nbsp;Fariba Ghaffari,&nbsp;Behrang Golmohammadi","doi":"10.1007/s10765-024-03464-7","DOIUrl":"10.1007/s10765-024-03464-7","url":null,"abstract":"<div><p>Gabapentin, as an anticonvulsant drug with its low-permeability feature in the gastrointestinal region, is one of the commonly prescribed medications for the treatment of epilepsy. Recently surface-active ionic liquids (SAILs) have been utilized to resolve this issue in aqueous solutions. Understanding the thermophysical and micellization behavior of SAILs is of paramount importance as it enables the design of efficient SAILs, and allows for drug property enhancement in pharmaceutical formulations. This study explores the thermophysical and micellization behavior of SAILs (2-hydroxyethyl)ammonium octanoate [2-HEA][Oc], bis(2-hydroxyethyl)ammonium octanoate [bis-HEA][Oc], tris(2-hydroxyethyl)ammonium octanoate [tris-2-HEA][Oc] in varied aqueous gabapentin solutions through the utilization of electrical conductivity, surface tension measurement, and conductor like screening model (COSMO) analysis. The electrical conductivity measurement for aqueous SAILs were conducted at temperature range of 298.15 K to 318.15 K and for the SAILs in aqueous gabapentin solution at varying concentration of 0.0100 to 0.0500 mol kg⁻¹ were conducted at 298.15 K. The surface tension measurements were conducted for the aqueous SAILs and SAILs in aqueous gabapentin solution with varying concentration at 298.15 K. The both of the techniques were employed to evaluate the critical micelle concentration (CMC) and its related thermophysical properties. For better understanding the interactions between these components, COSMO was utilized. The study revealed that CMC values increased with temperature but decreased with increasing gabapentin concentration. Thermodynamic parameters of micellization were calculated through electrical conductivity and surface tension measurement. Finally, interactions between SAILs and gabapentin were investigated through limiting molar conductivity <span>(Lambda_{0})</span>, and association constant <span>(K_{A})</span>, determination.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142845121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Inhibitory Effect of Magnetism on the Thermal Transport in Nd-Ce-Fe-B Sintered Magnet","authors":"Bo Peng,&nbsp;Jinyuan Xu,&nbsp;Jianhua Xu,&nbsp;Xiong Zheng,&nbsp;Huimin Wang,&nbsp;Peng Tan,&nbsp;Zhenzhen Qin,&nbsp;Guangzhao Qin","doi":"10.1007/s10765-024-03484-3","DOIUrl":"10.1007/s10765-024-03484-3","url":null,"abstract":"<div><p>Understanding the influence of magnetism on thermal transport is crucial for ensuring the stability and reliability of heat dissipation in magnetic devices. In this study, we examine the magnetism's impact on thermal transport using the widely utilized Nd-Ce-Fe-B sintered magnet as our focal point. By integrating transient hot wire measurements and multiscale simulations, we assess how magnetism affects thermal conductivity (<i>κ</i>) between its ferromagnetic (FM) and paramagnetic (PM) states. Our analysis reveals that the thermal conductivity in the FM state is lower than in the PM state, indicating magnetism's inhibitory effect on thermal transport in Nd-Ce-Fe-B magnet. This phenomenon can be attributed to the suppressed electron transport in the FM state, which effectively reduces the electronic contribution to <i>κ</i>. To validate our findings, we conduct practical heating experiments at the device level alongside multiscale simulations. This research would significantly contribute to the understanding of thermal transport in magnetic materials, laying the groundwork for the thermal design of innovative devices that incorporate magnetism.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142845120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of Effects of Vibrations on Nanofluid-Filled Pulsating Heat Pipe for Efficient Electric Vehicle Battery Thermal Management","authors":"Nikhil S. Mane,&nbsp;Vadiraj Hemadri,&nbsp;Siddhartha Tripathi","doi":"10.1007/s10765-024-03477-2","DOIUrl":"10.1007/s10765-024-03477-2","url":null,"abstract":"<div><p>Pulsating heat pipes are effective heat transfer devices that can provide passive thermal management solutions for electronics and electric vehicle batteries. In this work, the thermal performance and startup characteristics of a specially designed multiplanar PHP are investigated. Hybrid CuO + Fe₃O₄-water (2 wt. %) nanofluid is used as the working fluid in pulsating heat pipes. The improvement in cooling performance is assessed and compared to that of water. In mobile applications of PHPs like electric vehicle battery thermal management, components are regularly exposed to the vibrations induced by vehicle systems, and hence working characteristics of PHP under vibrations need a detailed investigation. Hence, this work also explores the effect of vibrations (~ 30 Hz) on the thermal performance of pulsating heat pipe to study its feasibility for electric vehicle battery thermal management application. The findings of this work show that with nanofluids, the startup temperature of pulsating heat pipe reduces marginally, and thermal resistance decreases by a maximum of 13.49%. Results also show that under vibrations, pulsating heat pipe shows significantly low startup temperature and reduced thermal resistance. A maximum decrease in thermal resistance under vibrations is observed at 45° pulsating heat pipe inclination; it is 11.40% for water and 8.05% for nanofluid. Also, a regression analysis is conducted to formulate a correlation to predict the thermal resistance of pulsating heat pipes based on different input parameters. The mean absolute percentage deviation (MAPD) between the predicted and experimental data is observed as 4.67% for the correlation based on current study data.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142845122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stability Optimization of Al2O3/SiO2 Hybrid Nanofluids and a New Correlation for Thermal Conductivity: An AI-Supported Approach","authors":"Fevzi Sahin","doi":"10.1007/s10765-024-03487-0","DOIUrl":"10.1007/s10765-024-03487-0","url":null,"abstract":"<div><p>Due to their high thermal conductivity compared to traditional coolants, nanofluids are preferred; however, their high thermal conductivity alone is meaningless without ensuring their stability. Therefore, when determining the appropriate mixing ratio (hybrid ratio) for hybrid nanofluids, which are starting to replace mono nanofluids today, the primary factor to consider should be stability. In this study, sedimentation and zeta potential measurements, which are methods for evaluating stability, were used to assess the stabilities of mono Al₂O₃/water and SiO₂/water nanofluids with mass fractions of 1 %, 2 %, and 3 %, as well as hybrid Al₂O₃/SiO₂/water (2 % to 1 %, 1 % to 2 %) nanofluids together for the first time in the literature, and the optimum Al2O₃/SiO₂ hybrid ratio was determined in terms of stability. The results showed that the optimal hybrid ratios for the stability of Al₂O₃–SiO₂/water nanofluids are 1 and 0.714. Furthermore, the thermal conductivities of stable mono and hybrid nanofluids were measured between 25 and 60 °C, and a new correlation valid for both mono and hybrid nanofluids was proposed by modeling with artificial neural networks (MSE = 8.2175E−5 and <i>R</i>² = 0.99958), with a maximum deviation ratio of 3.839 % (for mono SiO₂/water) from the experimental measurements.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142845117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamic Viscosity and Specific Heat Capacity of Near Eutectic Gallium–Indium–Tin Alloy","authors":"M. H. Buschmann,&nbsp;S. Feja,&nbsp;R. Künanz,&nbsp;C. Hanzelmann,&nbsp;R. Mondragón,&nbsp;L. Hernández,&nbsp;M. J. V. Lourenço,&nbsp;F. J. V. Santos,&nbsp;V. Nunes,&nbsp;M. Alves,&nbsp;C. A. Nieto de Castro","doi":"10.1007/s10765-024-03471-8","DOIUrl":"10.1007/s10765-024-03471-8","url":null,"abstract":"<div><p>The study presents experimental data of the viscosity and specific heat capacity of the near eutectic gallium–indium–tin alloy. Viscosity data cover the temperature range from the alloy’s melting point of 283.85 K (10.70 °C) to about 370.47 K (97.32 °C). Two independent teams using a capillarity viscosimeter and an oscillating cup viscosimeter obtained almost identical values. Below 373 K (100 °C) the data follow the Arrhenius correlation. Specific heat capacity data result from differential scanning calorimetry measurements and reach from 236 K (− 37 °C) to 340 K (67 °C). The Neumann–Kopp rule gives neither the solid nor the liquid state a satisfactory representation of the data. Approximation functions represent these two regions separately in an excellent manner. The study discusses several issues related to the thermophysical properties, namely melting and crystallisation, and a possible liquid-to-liquid crossover.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reference Correlations of the Viscosity and Thermal Conductivity of Acetone from the Triple Point to High Temperatures and Pressures","authors":"Sofia G. Sotiriadou,&nbsp;Eleftheria Ntonti,&nbsp;Marc J. Assael,&nbsp;Marcia L. Huber","doi":"10.1007/s10765-024-03465-6","DOIUrl":"10.1007/s10765-024-03465-6","url":null,"abstract":"<div><p>This paper presents new wide-ranging correlations for the viscosity and thermal conductivity of acetone (2˗propanone or dimethyl ketone) based on critically evaluated experimental data. Both correlations are designed to be used with a Helmholtz-energy equation of state (EOS) that extends from the triple point to 550 K, at pressures up to 700 MPa. The viscosity correlation is valid from the triple point to 550 K and up to 162 MPa pressure, while the thermal conductivity is valid from the triple point to 550 K and 700 MPa. The estimated uncertainty (at a 95 % confidence level) for the viscosity varies from a low of 2 % for the low-pressure gas (<i>p</i> &lt; 0.5 MPa) to 5.5 % for the liquid phase at pressures up to 162 MPa, and for thermal conductivity varies from a low of 3.5% for the low-pressure gas up to 6.2% for the thermal conductivity at pressures up to 700 MPa.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}